| 摘要 |
To provide an electron-emitting device that can be used to manufacture an image forming apparatus having a superior display quality and in which the development of the abnormal light emission point is suppressed and the unevenness of brightness is not caused. The electron-emitting device includes: a cathode electrode (2) and a gate electrode (3), which are formed on a base surface and opposed to each other with a space therebetween; and an electron-emitting film (5) which is located on the cathode electrode, and in the electron-emitting device, the electron-emitting film has two end portions (A and B) in a plane substantially parallel to the base surface in a direction substantially perpendicular to a direction along which the cathode electrode and the gate electrode are opposed to each other, and a structure is used in which electric field strengths applied between each of the two end portions (A and B) of the electron-emitting film and the gate electrode are made weaker than an electric field strength applied between a region between the two end portions (A and B) of the electron-emitting film and the gate electrode at a time of driving. <IMAGE>
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